pierre, dzhokhar tsarnaev is in serious condition, and in no shape to be questioned. >> my sources are telling me that the suspect has a wound to the throat and neck area, that's made it very difficult to speak. he apparently knows police killed his brother, but that special interrogation team is standing by, ready to go. >> and they'll ask him questions at first without reading him his miranda rights. when do you expect charges to be filed? >> charges could come as early today. terror charges that could bring the death penalty. he won't be read his miranda rights. they're going to use the public safety can exception. they're taking this extraordinary step because there could be an imminent threat still out there. i just got off the phone, george, with a senior law enforcement, of deep concern of ammunition, guns and working bombs these men had. they were so disciplined. >> any indication of another sleeper cell? >> right now, no evidence of a broader plot involving more people here, but law enforcement officials say they can't take that chance. the investigation is full tilt to find t